Objective To explored the mental stress situations and the relationship between mental stress, coping style and self-efficacy beliefs of the highland training recruits, and suggestions about mental health education of the recruits to be proposed.Methods The solider mental stress self-reported questionnaire, simplied coping style questionnaire, and generalized self-efficacy beliefs scale were administrated to 256 recruits from 3 companies have been randomly selected in a military training base of Qinghai province.Results The mental stress of the recruits included tension, sleepless, physical and mental exhaustion.The mental stress was significant positive correlation with negative coping style( r=0.349, P<0.01 ), and significant negative correlation with active coping style( r= -0.179, P<0.01 ), and with self-efficacy beliefs( r= -0.210, P<0.01 ).Meantime selfefficacy beliefs was significant positive correlation with active coping style( r = 0.532, P < 0.01 ).Negative coping style and self-efficacy beliefs could significantly predict mental stress.Conclusion Through these ways which improving the self-efficacy beliefs and instructing them to use suitable coping style may help the recruits reduce the mental stress. Key words: Recruits; Mental stress; Coping style; Self-efficacy beliefs